gnat_ugn.texi: Document new switch -gnato0.
2014-07-31 Robert Dewar <dewar@adacore.com> * gnat_ugn.texi: Document new switch -gnato0. * sem_ch3.ads: Minor reformatting. * gnatlink.adb (Process_Args): Compile bind file with -gnato0 (we do not want overflow checks when incrementing elaboration counters). * einfo.ads: Minor reformatting. From-SVN: r213328
This commit is contained in:
Robert Dewar
Arnaud Charlet
parent
e9a794351b
commit
e95ad7ea78
@ -1,3 +1,12 @@
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2014-07-31 Robert Dewar <dewar@adacore.com>
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* gnat_ugn.texi: Document new switch -gnato0.
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* sem_ch3.ads: Minor reformatting.
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* gnatlink.adb (Process_Args): Compile bind file with -gnato0
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(we do not want overflow checks when incrementing elaboration
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counters).
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* einfo.ads: Minor reformatting.
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2014-07-31 Robert Dewar <dewar@adacore.com>
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* exp_ch5.adb, freeze.adb, exp_ch3.adb: Minor comment correction.
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@ -47,10 +47,10 @@ package Einfo is
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-- and they correspond to conventional symbol table information. Other
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-- attributes include sets of meanings for overloaded names, possible
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-- types for overloaded expressions, flags to indicate deferred constants,
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-- incomplete types, etc. These attributes are stored in available fields
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-- in tree nodes (i.e. fields not used by the parser, as defined by the
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-- Sinfo package specification), and accessed by means of a set of
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-- subprograms which define an abstract interface.
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-- incomplete types, etc. These attributes are stored in available fields in
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-- tree nodes (i.e. fields not used by the parser, as defined by the Sinfo
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-- package specification), and accessed by means of a set of subprograms
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-- which define an abstract interface.
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-- There are two kinds of semantic information
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@ -82,10 +82,9 @@ package Einfo is
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--------------------------------
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-- XEINFO is a utility program which automatically produces a C header file,
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-- einfo.h from the spec and body of package Einfo. It reads the input
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-- files einfo.ads and einfo.adb and produces the output file einfo.h.
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-- XEINFO is run automatically by the build scripts when you do a full
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-- bootstrap.
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-- einfo.h from the spec and body of package Einfo. It reads the input files
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-- einfo.ads and einfo.adb and produces the output file einfo.h. XEINFO is run
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-- automatically by the build scripts when you do a full bootstrap.
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-- In order for this utility program to operate correctly, the form of the
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-- einfo.ads and einfo.adb files must meet certain requirements and be laid
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@ -302,13 +301,13 @@ package Einfo is
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-- access functions and set procedures to set the corresponding values, while
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-- synthesized attributes have only access functions.
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-- Note: in the case of Node, Uint, or Elist fields, there are cases where
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-- the same physical field is used for different purposes in different
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-- entities, so these access functions should only be referenced for the
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-- class of entities in which they are defined as being present. Flags are
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-- not overlapped in this way, but nevertheless as a matter of style and
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-- abstraction (which may or may not be checked by assertions in the body),
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-- this restriction should be observed for flag fields as well.
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-- Note: in the case of Node, Uint, or Elist fields, there are cases where the
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-- same physical field is used for different purposes in different entities,
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-- so these access functions should only be referenced for the class of
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-- entities in which they are defined as being present. Flags are not
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-- overlapped in this way, but nevertheless as a matter of style and
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-- abstraction (which may or may not be checked by assertions in the
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-- body), this restriction should be observed for flag fields as well.
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-- Note: certain of the attributes on types apply only to base types, and
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-- are so noted by the notation [base type only]. These are cases where the
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@ -390,8 +389,8 @@ package Einfo is
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-- case of subprograms to control output of certain warnings.
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-- Aft_Value (synthesized)
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-- Applies to fixed and decimal types. Computes a universal integer
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-- that holds value of the Aft attribute for the type.
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-- Applies to fixed and decimal types. Computes a universal integer that
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-- holds value of the Aft attribute for the type.
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-- Alias (Node18)
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-- Defined in overloadable entities (literals, subprograms, entries) and
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@ -4201,6 +4201,13 @@ of GNAT other than the JGNAT, .NET or GNAAMP versions), then the use of
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Historically front end inlining was more extensive than the gcc back end
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inlining, but that is no longer the case.
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@item -gnato0
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@cindex @option{-gnato0} (@command{gcc})
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Suppresses overflow checking. This causes the behavior of the compiler to
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match the default for older versions where overflow checking was suppressed
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by default. This is equivalent to having
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@code{pragma Suppress (Overflow_Mode)} in a configuration pragma file.
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@item -gnato??
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@cindex @option{-gnato??} (@command{gcc})
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Set default mode for handling generation of code to avoid intermediate
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@ -4226,11 +4233,11 @@ If no digits follow the @option{-gnato}, then it is equivalent to
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causing all intermediate overflows to be handled in strict mode.
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This switch also causes arithmetic overflow checking to be performed
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(as though pragma @code{Unsuppress (Overflow_Mode)} has been specified.
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(as though @code{pragma Unsuppress (Overflow_Mode)} had been specified.
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The default if no option @option{-gnato} is given is that overflow handling
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is in @code{STRICT} mode (computations done using the base type), and that
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overflow checking is suppressed.
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overflow checking is enabled.
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Note that division by zero is a separate check that is not
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controlled by this switch (division by zero checking is on by default).
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@ -6,7 +6,7 @@
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1996-2013, Free Software Foundation, Inc. --
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-- Copyright (C) 1996-2014, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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@ -676,6 +676,12 @@ procedure Gnatlink is
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Binder_Options.Increment_Last;
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Binder_Options.Table (Binder_Options.Last) := new String'("-gnatws");
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-- Also suppress overflow checks (needed now that we have them on by
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-- default, we want checks off when incrementing elaboration counters).
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Binder_Options.Increment_Last;
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Binder_Options.Table (Binder_Options.Last) := new String'("-gnato0");
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-- If we did not get an ali file at all, and we had at least one
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-- linker option, then assume that was the intended ali file after
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-- all, so that we get a nicer message later on.
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@ -50,18 +50,18 @@ package Sem_Ch3 is
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(Related_Nod : Node_Id;
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N : Node_Id) return Entity_Id;
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-- An access definition defines a general access type for a formal
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-- parameter. The procedure is called when processing formals, when
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-- the current scope is the subprogram. The Implicit type is attached
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-- to the Related_Nod put into the enclosing scope, so that the only
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-- entities defined in the spec are the formals themselves.
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-- parameter. The procedure is called when processing formals, when the
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-- current scope is the subprogram. The Implicit type is attached to the
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-- Related_Nod put into the enclosing scope, so that the only entities
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-- defined in the spec are the formals themselves.
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procedure Access_Subprogram_Declaration
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(T_Name : Entity_Id;
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T_Def : Node_Id);
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-- The subprogram specification yields the signature of an implicit
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-- type, whose Ekind is Access_Subprogram_Type. This implicit type is
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-- the designated type of the declared access type. In subprogram calls,
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-- the signature of the implicit type works like the profile of a regular
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-- type, whose Ekind is Access_Subprogram_Type. This implicit type is the
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-- designated type of the declared access type. In subprogram calls, the
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-- signature of the implicit type works like the profile of a regular
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-- subprogram.
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procedure Add_Internal_Interface_Entities (Tagged_Type : Entity_Id);
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@ -94,8 +94,8 @@ package Sem_Ch3 is
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-- enclosing declaration that generated Ityp.
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--
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-- A related mechanism is used during expansion, for itypes created in
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-- branches of conditionals. See Ensure_Defined in exp_util.
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-- Could both mechanisms be merged ???
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-- branches of conditionals. See Ensure_Defined in exp_util. Could both
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-- mechanisms be merged ???
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procedure Check_Abstract_Overriding (T : Entity_Id);
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-- Check that all abstract subprograms inherited from T's parent type have
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@ -126,11 +126,11 @@ package Sem_Ch3 is
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Parent_Type : Entity_Id;
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Actual_Subp : Entity_Id := Empty);
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-- Derive the subprogram Parent_Subp from Parent_Type, and replace the
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-- subsidiary subtypes with the derived type to build the specification
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-- of the inherited subprogram (returned in New_Subp). For tagged types,
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-- the derived subprogram is aliased to that of the actual (in the
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-- case where Actual_Subp is nonempty) rather than to the corresponding
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-- subprogram of the parent type.
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-- subsidiary subtypes with the derived type to build the specification of
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-- the inherited subprogram (returned in New_Subp). For tagged types, the
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-- derived subprogram is aliased to that of the actual (in the case where
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-- Actual_Subp is nonempty) rather than to the corresponding subprogram of
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-- the parent type.
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procedure Derive_Subprograms
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(Parent_Type : Entity_Id;
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@ -183,10 +183,10 @@ package Sem_Ch3 is
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(C : Entity_Id;
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N : Node_Id := Empty) return Boolean;
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-- Determines if a record component C is visible in the present context.
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-- Note that even though component C could appear in the entity chain
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-- of a record type, C may not be visible in the current context. For
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-- instance, C may be a component inherited in the full view of a private
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-- extension which is not visible in the current context.
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-- Note that even though component C could appear in the entity chain of a
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-- record type, C may not be visible in the current context. For instance,
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-- C may be a component inherited in the full view of a private extension
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-- which is not visible in the current context.
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--
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-- If present, N is the selected component of which C is the selector. If
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-- the prefix of N is a type conversion inserted for a discriminant check,
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@ -199,9 +199,9 @@ package Sem_Ch3 is
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Suffix_Index : Nat := 1;
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In_Iter_Schm : Boolean := False);
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-- Process an index that is given in an array declaration, an entry
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-- family declaration or a loop iteration. The index is given by an
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-- index declaration (a 'box'), or by a discrete range. The later can
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-- be the name of a discrete type, or a subtype indication.
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-- family declaration or a loop iteration. The index is given by an index
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-- declaration (a 'box'), or by a discrete range. The later can be the name
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-- of a discrete type, or a subtype indication.
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--
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-- Related_Nod is the node where the potential generated implicit types
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-- will be inserted. The next last parameters are used for creating the
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@ -257,9 +257,9 @@ package Sem_Ch3 is
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-- primitive operations of the private view (in the tagged case).
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-- N is the N_Full_Type_Declaration node.
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--
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-- Full_T is the full view of the type whose full declaration is in N.
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-- Full_T is the full view of the type whose full declaration is in N.
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--
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-- Priv_T is the private view of the type whose full declaration is in N.
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-- Priv_T is the private view of the type whose full declaration is in N.
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procedure Process_Range_Expr_In_Decl
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(R : Node_Id;
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@ -298,12 +298,12 @@ package Sem_Ch3 is
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(N : Node_Id;
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Prev : Entity_Id := Empty);
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-- Process the discriminants contained in an N_Full_Type_Declaration or
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-- N_Incomplete_Type_Decl node N. If the declaration is a completion,
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-- Prev is entity on the partial view, on which references are posted.
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-- However, note that Process_Discriminants is called for a completion only
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-- if partial view had no discriminants (else we just check conformance
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-- between the two views and do not call Process_Discriminants again for
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-- the completion).
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-- N_Incomplete_Type_Decl node N. If the declaration is a completion, Prev
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-- is entity on the partial view, on which references are posted. However,
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-- note that Process_Discriminants is called for a completion only if
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-- partial view had no discriminants (else we just check conformance
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-- between the two views and do not call Process_Discriminants again
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-- for the completion).
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function Replace_Anonymous_Access_To_Protected_Subprogram
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(N : Node_Id) return Entity_Id;
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